Automatic safety water-gage for boilers.



s. MUNSON. AUTOMATIC SAFETY WATER GAGE FOR BOILERS. I v

APPLICATION FILED JULY 11, 1912.

Patanted July 8, 1913.

INVENTOR Mu n s o n Sweney WITNESSES BY Q0 ATTORNEYS SWENEY MUNSON, orFOWLER, COLORADO.

AUTOMATIC SAFETY WATER-GAGE FOR BOILERS.

Specification of Letters Patent.

Patented July 8, 1913.

Application filed July 11, 1912. Serial No. 708,929

To all whom/2'15 may concern:

I lie it. known that I, SWENEY MUNsoN, a citizen of-the United Stateaanda resident of Fowler, in the county of Otero and State of Colorado, haveinvented a new and Improved Automatic Safety Water-Gage for lioilers, ofwhich the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved automaticsafety water gage for boilers arranged to permit shutting 0d the steamor water from the boiler whenever it is desired to remove the main valvefor replacing a worn out gasket to prevent the gage from leaking when inuse.

For the purpose mentioned, use is made of the main valve having a gasketremovably held in place by a pin screwed into the main valve andextending through the valve seat for the main valve, the said. pincontrolling a check valve for closing the gage cock by pressure fromwithin the boiler whenever the main valve is removed for replacing aworn out gasket by a new one.

A practical embodiment of the invention is represented in theaccompanying drawings forming a part of this specification, in whichsimilar characters of reference are in both views.

Figure 1 is a longitudinal central section of the automatic safety watergage as applied; and Fig. 2 is a transverse section of the same on theline-2 2 of Fig. 1.

In gage cocksas heretofore constructed and having solid seat and asolid'v'alve, it has been very diflicultto provide a tight valve forany'length of time especially as the'gage cock is frequently actuatedand is liable to leak in a comparatively short time. This is especiallythe case in gage cocks in which a check valve is used as the latter soonpermit leakage more'or less and then it is impossible to grind in themain valve seat' withany considerable amount of steam pressure in theboiler because a small leak past the check valve blows away any emery orother abrasive material used for grinding in-pu1'poses,and without suchgrinding material a joint cannot be made and consequently theboilerwould have to be cooled off and no advantage gained over theordinary gago cocks now generally used and having no check valve.Vit-lrthe gage cock pres Intly to be described in detail the grinding'11 operation is completely dispensed with, and use is made of aremovable gasket of copper or othermaterial softer than the I main valveseat so that the gasket takes all the wear of the steam and waterpassing through the gage cocks, and in case a gasket is worn out and thegage cockbegins to leak then it can be readily removed and replaced by anew one. The gasket can be renewed even should the check valve leak, andat the most it will take but a few'minutes to make the change whereas ifthe seat had to be ground in it would take a considerably longer time.

The body A of the gage cock is provided near its inner end with anexterior thread A screwing into a threaded. aperture in the head B ofthe boiler, as indicated in Fig. 1. The outer end of the body A isprovided with the usual bonnet C in which screws the valve stem D andwhich is provided with the usual packing E for holding the stem D tightinthe bonnet. The inner end of the stem D is provided with a main valveF,

faced by a gasket G, of copper or other suitable material, and adaptedto be seated on the main valve seat H forming an integral part of thebody A. The gasket G is held in place on the main valve F by the head I,of a pin I having a threaded end I screwing in the main valve F so thaton unscrewing the pin I a worn out gasket G can be readily removed fromthe main valve F and replaced by a new one. The new gasket is thensecured in position on the main valve F by screwing the pin I inposition so that its head I engages the outer face of the gasket G andholds the same firmly in position on the main valve F. The pin I isadapted to engage a. check Valve J adapted to be seated on the valveseat K formed integrally on the valve body A and in axial alinement withthe seat H and in communication therewith or the portion A of the boreof the valve body. The check valve J is provided with a stem J mountedtoslide in a bearing formed in a cap L I screwing in the inner end of thebody A, the said innerend being provided with openings A for the passageof steam or water into the body A, the said inner end being providedwith openings A for the passage of the steam or water into the body A.The body A is provided with the usual outlet A. Normally the main valveF is in innermost position and its gasket G is seated on the main valveseat H to close the-portion F is in this position, the pin I whichext-ends through the bore portion A holds the check valve 'J in openposition relative to its seat K. I

When the main valve F is opened then the steam or liquid can flow fromthe boiler by way of the openings A to open the valve seat K. boreportion A valve seat 11 and outlet A to the outside, it being understoodthe bonnet C is unscrewed from the body A,

to permit of removing the worn out gasket G from the main valve F and toallow placing a new gasket in position on the said main valve, aspreviously explained. lVhen this has been done the bonnet C with themain valve is thenreplaced, and the above-described operation isrepeated, that is, the valve F is moved toward the main valve seat H toseat'the gasket G thereon, and in doing so, the pin I pushes the checkvalve J oii its seat K and holds it off its seat during the time thegage cock is used for its usual purpose.

From the foregoing it will be seen that bv the arrangement described,the use of a so t metal gasket G dispenses with the grinding in of themain valve seat H, and even should the-check valve J leak when seated onits seat K it does not prevent removal of the bonnet G on the main valveF for replacing the worn out gasket G with a new one.

Having thus described my invention, Iv

claim as new and desire to secure by Letters Patent:

1. An automatic safety gage cock for boilers, comprising a body arrangedfor attachment to the'boiler and provided with a main valve seat and acheck valve seat, a main valve movable lengthwise in the said body andhaving a removable gasket adapted to be seated on the said main valveseat, a check valve adapted to be seated on the said check valve seat,and a pin screwing in the said main valve and having a head-engaging thesaid gasket to hold the latter removably in position on the main valve,the said pin extending through the said valve seats to move 7 the checkvalve off its seat on closing the main valve and to allow the checkvalve to move onto its seat'on'removing the main valve from the body.

2. An automatic safety gage cock for boilers, comprising a body providedwith a screw thread adapted to screwinto the boiler head, the said bodyhaving a main valve seat and a check valve seat in axial alinenient withthe said main valve seat and in communication there-with, a main valvehaving a stemscrewing in the said body, said main valve having a surfaceto engage the said main valve seat, a pin extending from 'the said mainvalve and passing through the said valve seats, a check valve adapted tobe seated 011 the said check valve seatand havinga stem, and acapclosing the inner endof the said body and provided with a bearing forthe stem of the said check valve, the said inner end of the body beingprovided with apertures for the passage of steam or water into the body.

3. A device of the character described, comprising a tubular body memberarranged for attachment to a boiler, said tubular body being providedwith a main valve seat and a check valve seat, a main valve movablelengthwise of said body and adapted to engage said main valve seat, acheck valve provided with a portion for engaging said check valve seat,a pin mounted upon said main valve and provided with an extendedportion, and a gasket carried by said main valve and detachably heldthereupon by said extending portion of said pin, said pin extendingthrough both of said valve seats and adapted to engage said check valve.

4. A device of the character described, comprising a tubular bodyarranged for attachment to a boiler and provided with a main valve seatand a check valve seat, a main valve movable lengthwise of said bodytoward. and from said main .valve seat, a gasket carried by said mainvalve and adapted to rest upon said main valve seat when said main valveis moved toward the latter, a pin screwed into said main valve carryingan angular head serving the double purpose of holding said gasket uponsaid main valve and of enabling said pin to be turned in order to securesaid pin in position upon said main valve, said pin extending throughsaid main valve seat and through said check valve seat, and a checkvalve provided with a portion for engaging said check valve seat andwith a portion to be engaged by said pin.

In testimony whereof I have signed my 'name to this specification in thepresence of two subscribing witnesses.

SWENEY MUNSON.

\Vitnesses R. E. RUSSELL, lV. A. VVnrrnocx.

